| tcomIAddinEntry | Interface implemented by Addin |
| tcomIApplication | Main application object |
| tcomIAttribute | Collection of attributes |
| tcomIAttributes | Collection of attributes |
| tcomIComponent | Domain component |
| tcomIComponents | Collection of components |
| tcomIDocument | Document object |
| tcomIDocumentIOComponent | Shared Input/Output Component |
| tcomIDocumentListener | Document send state notification interface |
| tcomIDocumentManagerComponent | Document Manager Component |
| tcomIDocuments | Collection of documents |
| tcomIDomain | Domain |
| tcomIDomainConfiguration | Domain configuration |
| tcomIDomainListener | Domain state notification interface |
| tcomIDomains | Collection of domains |
| tcomIFrame | Frame |
| tcomILoginDialog | Login dialog object |
| tcomIObjectView | Object view |
| tcomIPackageOle | Tahiti OLE Package Interface |
| tcomIPage | Page object |
| tcomIPages | Collection of pages |
| tcomIProfile | Tahiti Profile |
| tcomIProfiles | Collection of profiles |
| tcomIScanJob | Scan job |
| tcomIScannerComponent | Scan Component |
| tcomISharedComponent | Shared component |
| tcomISharedComponents | Collection of shared components |
| tcomISharedConfiguration | Shared configuration |
| tcomIViewObject | View object |
| tcomIViewObjectContainer | Object Container |